TITLE:   GCN CIRCULAR
NUMBER:  35532
SUBJECT: Fermi  trigger No 726773850: Global MASTER-Net observations report
DATE:    24/01/13 11:15:35 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>

V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik,  D. Vlasenko,
G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij
(Lomonosov Moscow State University, SAI, Physics Department),

R. Podesta, C.Lopez, F. Podesta, C.Francile
(Observatorio Astronomico Felix Aguilar OAFA),

R. Rebolo, M. Serra
(The Instituto de Astrofisica de Canarias),

D. Buckley
(South African Astronomical Observatory),

O.A. Gress, N.M. Budnev, O.Ershova
(Irkutsk State University, API),

L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,
A.R.Corella, L.H.Rodriguez
(INAOE, Guillermo Haro Astrophysics Observatory),

A. Tlatov, D. Dormidontov
(Kislovodsk Solar Station of the Pulkovo Observatory),

V. Yurkov, A. Gabovich
(Blagoveschensk Educational State University)

MASTER-Tunka robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB240112.73 (trigger No 726773850,17h 29m 57.60s , +29d 09m 00.0s, R=2.34) errorbox  60679 sec after notice time and 60712 sec after trigger time at 2024-01-13 10:29:17 UT, with upper limit up to  15.8 mag. Observations started at twilight.  The observations began at zenith distance = 78 deg. The sun  altitude  is -9.8 deg. 

The galactic latitude b = 29 deg., longitude l = 53 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2354479

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

   60714 | 2024-01-13 10:29:17 |        MASTER-Tunka | (17h 26m 43.34s , +31d 35m 05.0s) |   C |     1 | 13.3 |        
   60755 | 2024-01-13 10:29:59 |        MASTER-Tunka | (17h 41m 27.44s , +29d 41m 01.1s) |   C |     1 | 13.1 |        
   61496 | 2024-01-13 10:42:12 |        MASTER-Tunka | (17h 44m 34.77s , +31d 33m 39.2s) |   C |    15 | 15.8 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.